Extension-skate



(No-Model.)

M. BLDUNBAR. EXTENSION SKATE.

NO. 490,?72. Patented Jan. 31A, 1,893.

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MARCENE B. DUN BAR, OF TORRINGTON, CONNECTICUT.

EXTENSION-SKATE.

SPECIFICATION forming part of Letters Patent No. 490,872, dated January31, 1893.

Application filed March Z2. 1892. Serial No. 425.951. (No model.) l

To @ZZ whom' it may concern:

Be it known that I, MAROENE B. DUNBAR, a citizen of the United States,residing at Torrington, in the county of Litchfield and State ofConnecticut, have invented certain companying drawings forming part ofthis specification in which,

Figure lis a side elevation of my improved skate complete. Fig. 2, aplan view of the sole plate. Fig. 3, a longitudinal section on the linea; m in Fig. a. Fig. 4t, a transverse section on the line y y in Fig. 3.Fig. 5, a similar section illustrating slight changes in the details ofconstruction, and, Fig. l'6 is a detail sectional View on the lines z zin Fig. 1, illustrating the manner in which the Shanks of the soleclamps are held in place.

1 denotes the blade, 2 the heel plate which is rigidly secured theretoin the ordinary or any preferred manner, and is provided at its forwardend with an engaging lug 3, 4 the heel slide having the usual engaginglugs 5, 6 the sole plate,7 the sole clamps, the shanks 7a of which arepivoted to a plate 8 having .a threaded lug 9 engaged by the usualadjusting screw 10, the rear end of said screw engaging and turningfreely in an eye 11 which is pivoted to the locking lever 12. Theseparts with the exception of the sole plate may all be of any ordinary orpreferred construction and as they are not of the essence of myinvention, will not be described in detail. under side with a rib 13 thebottom of which is straight, t'. e. not curved to correspond with thecurvature of the sole plate, and which engages a groove 14 in a plate 15which is rigidly secured to the blade a. This rib enables me to userelatively light metal for the sole plate to which it imparts therequired rigid- The sole plate is provided on its ity, the rib itselfresting firmly on plate 15 inV which it slides when the skate isextended. If preferred the groove ltmaybe formed in the rib, as in Fig.5, and plate 15 may be provided with a rib 13' engaging said groove, asis clearly shown in said figure. In the drawings I have shown plate 15as -provided with ears 16 which rest upon the opposite sides of theblade to which they are secured by arivet 17 which passes through theears and' the blade. In practice the sides of the rib are made to taperoutward from its base, and the sides of the groove to taper inward fromits bottom so that when the rib is slid into the groove it cannot bemoved except in the man- V ner which will' be presently explained. Itwill be seen in Figs. 1 and 6 that the use of rib 13 enables me todispense with the button ordinarily used in this class of skates to holdthe shanks of the sole clamps in place.

13b, see Fig. 6, denotes slots at the rear end of the rib which receiveshanks 72L and retain them in place, thereby dispensing with the use ofthe buttons heretofore essential.

18 denotes threaded holes in plate 15, and 19 ahole through the soleplate and rib. A screw 2O passes through hole 19 and engages either-ofthe threaded holes in plate 15. 4To move the sole plate therefore itissimply necessary to remove screw 20 and move the plate eitherforward orbackward as may be required until hole 19 registers with the next hole18 in plate 15. In the drawings I have shown plate 15 as provided withlive holes, more or less may be used if preferred, I iind five quitesufficient, however, in practice. It will be seen that this adjustmentenables the user to lengthen the skate with very little trouble and atthe same time makes the skate very strong, ss in addition kto screw 20the sole plate is held locked in position by the engagement of the ribwith the overhanging groove.

Having thus described my invention, I claim:

1. The combination with a blade and a plate 15 rigidly secured theretoand provided with threaded holes, of av sole plate having on its underside a rib 13, a tongue and groove connecting said plate and said rib,slots 13b at the rear end of the rib, sole clamps engaging said slotsand connected to a plate 8 hav'l ing a lug 9, an adjusting screwengaging said IOOk lug, a hole 19 through the sole plate and rib 13, anda screw adapted to pass through the hole in the sole plate and rib andengage either of the holes in plate 15.

2. The combination with the blade having a plate 15 rigidly seeuredthereto said plate having threaded holes 18 and sole clamps of ordinaryconstruction, of the sole plate having on its under side a rib, a tongueand groove connection between said plate and said rib said rib havingslots 13b at its rear ends which are engaged by the Shanks of the soleclamps for the purpose set forth, and a screw passing through the soleplate and engaging either of the holes in plate 15.

In testimony whereof I affix mysignature in presence of two witnesses.

MARCENE B. DUNBAR. Witnesses:

OHAs. L. MCNEIL, J oI-IN W. BROOKS.

